I have given up flying since I went to visit my grandmother on her 100th birthday in 2006. I tried to give up paying federal income tax to Uncle Sam, but he plays hardball, and I have a family who depends on my income.

I try to reduce my flying as much as possible. I've flown less than once a year for more than 10 years. I used to fly every other week for many years before.

Subplot to build myself a pedal powered aircraft.

After a career as a pilot, in 2007 I gave up all flying, even as a passenger, for exactly this reason.

IT is the solution:
http://www.comedycentral.co.uk/south-park/videos/flexigrips

I don't fly because of passenger name records, so for… privacy reasons.
I don't fly national (that wouldn't require PNR as far as I know) for envoirement reasons (but I drive a lot by car).

If there would be a way to fly anonymous (or at least… more anonymous) I would fly like… every three or five years one time.

Another reason to avoid flying!
https://tech.slashdot.org/story/18/11/26/1550211/airlines-face-crack-down-on-use-of-exploitative-algorithm-that-splits-up-families-on-flights

I do fly because no flying means no travel.

I wish there were cleaner alternatives.

When there is choice I prefer trains for this and other reasons.

i dont like the South Park solution...

I do fly because no flying means no travel.

This depends on where you live. If you are in the Australian outback or in Nepaliran Himalaya it is true.

I travel a lot by car. I am from Western Germany And every year I travel to a campsite anywhere, Frankfurt, to Berlin and Leipzig. And most years to Hamburg and/or Netherlands.

Next year I want to travel to Scotland... by farry.

This depends on where you live.

Sure.

I am in Moscow. I currently don't have a car. I usually use trains for local travel but it is not feasible for anything international (although we do have decent railroad connection with Helsinki - took a train there a couple times).

Myself I think air travel should be replaced with modern railroad wherever possible. It has a lot of consumer advantage too.

I agree. From Moscow it's pretty hard indeed I guess.
And yes, many flights could be well replaced by train. I use my car because:

• It's cheaper or equal price to train
• It has better load capacity (three persons, two tents, six computers, clothes for 5 days, 80kg cable... this is hard by train)

Does flying really burn more fuel, per passenger, than driving a reasonably efficient car?

Most airliners can achieve about 75 passenger miles per US gallon. A four passenger car can easily do 100% better than that. Electric cars are far better.

Also exhaust from airliners flying in the stratosphere has a much bigger effect on climate change, because it contributes to excessive cirrus cloud formation, which keeps heat in the atmosphere instead of radiating off into space.

Does flying really burn more fuel

Does not seem so.

This is relatively short flight (thus less efficient) yet I see about 3.5-3.8L/100km/passenger. This seems more or less on par with a car. Longer flights will be more efficient.